/*
 * RED5 Open Source Flash Server - http://code.google.com/p/red5/
 * 
 * Copyright 2006-2014 by respective authors (see below). All rights reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.red5.server.scope;

import org.red5.server.api.IServer;
import org.red5.server.api.persistence.IPersistenceStore;
import org.red5.server.api.persistence.PersistenceUtils;
import org.red5.server.api.scope.IGlobalScope;
import org.red5.server.api.scope.ScopeType;
import org.red5.server.jmx.mxbeans.GlobalScopeMXBean;
import org.springframework.jmx.export.annotation.ManagedResource;

/**
 * Global scope is a top level scope. Server instance is meant to be injected
 * with Spring before initialization (otherwise NullPointerException is thrown).
 * 
 * @see org.red5.server.api.scope.IGlobalScope
 * @see org.red5.server.api.scope.IScope
 * @see org.red5.server.scope.Scope
 */
@ManagedResource
public class GlobalScope extends Scope implements IGlobalScope, GlobalScopeMXBean {

	// Red5 Server instance
	protected IServer server;

	{
		type = ScopeType.GLOBAL;
		name = "default";
	}

	/**
	 * 
	 * @param persistenceClass Persistent class name
	 * @throws Exception Exception
	 */
	@Override
	public void setPersistenceClass(String persistenceClass) throws Exception {
		this.persistenceClass = persistenceClass;
		// We'll have to wait for creation of the store object
		// until all classes have been initialized.
	}

	/**
	 * Get persistence store for scope
	 * 
	 * @return Persistence store
	 */
	@Override
	public IPersistenceStore getStore() {
		if (store == null) {
			try {
				store = PersistenceUtils.getPersistenceStore(this, this.persistenceClass);
			} catch (Exception error) {
				log.error("Could not create persistence store.", error);
				store = null;
			}
		}
		return store;
	}

	/**
	 * Setter for server
	 * 
	 * @param server Server
	 */
	public void setServer(IServer server) {
		this.server = server;
	}

	/** {@inheritDoc} */
	@Override
	public IServer getServer() {
		return server;
	}

	/**
	 * Register global scope in server instance, then call initialization
	 */
	public void register() {
		server.registerGlobal(this);
		init();
	}

}
